g-refen



' N o M o a e 1 3 Sheets-Sheet 1.

- H. GREFEN.

ELECT LLLLLLLL K. C I No. 450,068. Patented Apr. 7, 1891.

(No Model.) 3 Sheets-Sheet 2. H. GREFEN ELECTRICAL LOCK. No. 450,068. Patented Apr. 7,1891.

(No Model.) I v 3 Sheets-'-Sheet 3.

H. GREPEN'.

ELECTRICAL 1.001;; No. 450,068. Patented Apr. 7, 1.891.

II II liiil l ili illlillli A WA IIIIIIIIIIIIIIIlI/IIIIIIIIIIIIIIIIIII JINUIIIIIIII m /Alll I/IIIIIIIIIII/III/I/l/l/lI/l/MmWI/IIMIIM/I/IA UNITED STATES PATENT OFFICE.

HEINRICH GREFEN, OF OBERHAUSEN, GERMANY.

ELECTRICAL LOCK.

SPECIFICATION forming part of Letters Patent No. 450,068, dated April '7', 1891.

Application filed May 19, 1890, Serial No- 352,355. (No model.)

To all whom it may concern.-

Be it known that I, HEINRICH GREFEN, a subject of the King of Prussia, residing at Oberhausen, in the Kingdom of Prussia and Empire of Germany, have invented certain new and useful Improvements in Electric Locks, of which the following is a specification.

The invention relates to a door-lock which is adapted to be operated through the agency of an electric circuit from a distant point or in the usual manner by means of a key or a knob applied to the lock.

The invention comprises a locking-bolt beveled on the inside, so as to adapt it to snap into the keeper, a latch-bolt beveled on the opposite side to the locking-bolt, whereby it is automatically withdrawn at the opening of the door, a connection between the lockingbolt and the latch-bolt whereby the projection of the latter withdraws the former, a detent controlled by an electro-magnet for holding the latch-bolt in withdrawn position, a strong spring for projecting the latch-bolt when released from the detent, and a relatively weaker spring for projecting the locking-bolt when not opposed by the latch-bolt.

I11 order that the invention may befully understood, I will describe the same with reference to the accompanying drawings, in

which-- Figure I is a side elevation of a lock constructed in accordance with my invention, the inner face-plate being removed and the parts being in the positions occupied when the door is locked. Fig. II is a similar view, but representing the parts in opposite positions to those shown in Fig. I. In this view a lower supplemental locking-bolt is shown in its proj ectedposition. Fig. III is a plan of the lock, the top being removed. Fig. IV is a section on the line IV IV, Fig. I. Fig. V is a section on the line V V, Fig. I. Fig. VI is an end View of the lock with the casing removed.

(t represents the locking-bolt, a the latchbolt, and c." the rocking lever pivoted at or near its center and having the upper arm 1; engaging opposite sides of a notch 10 in the locking-bolt a, and a lower arm 10 engaging the rear side of an enlarged notch 00, formed in the latch-bolt a. I

t' represents a detent having a hook '1," on

one end engaging the shoulder at on the latchbolt a and connected at the other end by a link 7c with a lever 72, having a spring y on one end adapted to disengage the detent from the latch-bolt and having a nose h at the other end, which is engaged by the hook d on the armature d of an ele'ctro-magnet A. The armature is provided with a spring 25 for withdrawing it from the magnet when the latter is de-energized, and shoulders a and h" are formed on the latch-bolt a and lever h with such relation that the said lever is forced into engagement with the armature when said latch-bolt is projected. The lever 41 is pivoted to t" and has a spring a for forcing said lever or detent into engagement with the latch-bolt,

said spring'being Weaker than the spring y,

however, and performing its function only when permitted by the position of the lever h. A current being introduced from an outer circuit through the binding-posts, the armature is attracted, whereupon the latch-bolt will be released and projected by its spring, at the same time withdrawing the locking-bolt. A key-hole'is provided in close proximity to the armature, so that a key may be introduced, and a shoulder g on the armature cl will be engaged by the bit of said key to cause the release of the lever h, and consequently of the latch-bolt a. A square head 0 on the lever d" is adapted to receive a knob a, so that the bolt a may be withdrawn by turning said knob and without the use of the operating mechanism or even interfering with the same.

The operation of the device is as follows: The circuit being closed at a distant point, the current passes in through the binding-posts secured in the casing of the lock, the magnet is energized and the armature attracted. By this operation the lever h is immediately released and drawn down by the spring y, attached to end .2 of said lever, and this movement is imparted through the link (having elongated opening by which it is connected to the detent for the purpose of insuring the operation) to disengage said detent from the latch-bolt. The latch-bolt being disengaged, it is immediately projected by its strong spring Z, at the same time rocking the lever 61' on its fulcrum and Withdrawing the locking-bolt a, the weak spring I being overcome. The locking and latch bolts being now in the occupies when the door is locked.

positions shown in Fig. 11 and the latch-bolt a being beveled on the outer face, the door may be readily opened by slight pressure. Immediately upon the opening of the door and the consequent withdrawal of the latchbolt, which is retained in its withdrawn position by the detent t', the locking-bolt will be free to be projected by its spring Z back into the position shown in Fig. I, which is also the position relatively to the lock which it To permit the door to be closed when the bolts are in this position, the locking-bolt d is beveled on its inner face, which is the opposite side to that on which the bevel of the latch-bolt is located, and consequently when it comes in contact with the keeper upon the closing of the door it snaps into the same. Should a party without wish to unlock the door, it may be done by the introduction of a key into the key-hole shown and turning the same until the bit comes in contact with the shoulder on the armature. Should a party from within wish to unlock the door, the same is done by turning the knob c, as hereinbefore explained. The ordinary safety latch or bolt may also be used in connection with this lock, as shown, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the locking-bolt, a lever for withdrawing said locking-bolt, a latch-bolt controlling said lever and having a projecting spring, a detent for opposing the operation of said latch-bolt upon the lever, and means, substantially as described, for controlling said detent.

2. The combination of the locking bolt having the beveled edge, the lever for withdrawing said locking-bolt, the latch-bolt controlling said lever, having a face beveled on the side opposite that of the locking-bolt, and a spring for projecting it, a detent for holding the latch-bolt in withdrawn position, and an electro-magnet controlling said detent, said locking-bolt being provided with a projecting spring weaker than that of the latchbolt, substantially as and for the purpose set forth.

3. The combination of thelocking-bolt and the latch-bolt adapted to be retracted by the closing and opening of the door, respectively, a connection between said bolts, whereby the projection of the latter withdraws the former, a detent adapted to retain'the latch-bolt in withdrawn position, means for controlling said detent, and springs for projecting the re spective bolts, the spring of the latch-bolt being stronger than and adapted to overcome the spring of the locking-bolt, all substantially as and for the purpose set forth. I

4. The combination of the locking-bolt havinga projecting spring, the latch-bolt having a relatively stronger projecting spring, a lever engaging the bolts, whereby the projection of the latch-bolt withdraws the locking-bolt,the detent engaging the latch-bolt to hold it in withdrawn position, a lever having-a linkconnection with the detent, an electro-magnet normally engaging said lever, a spring for shifting the lever to release the detent when disengaged by the armature, and a shoulder on the latch-bolt engaging the lever and adapted to force it into engagement with the armature when said latch-bolt is projected, substantially as and for the purpose set forth.

5. The combination of the locking-bolt, the latch bolt, a lever forming the working connection between the latch-bolt and lockingbolt, the detent, the armature controlling said detent through suitable connections, the electro-magnet controlling said armature, the keyhole adapted for the reception of a key and located in proximity to the armature, whereby the key may be brought into contact with the same, and means for operating the abovementioned locking-bolt, all substantially as and for the purpose set forth.

6. The combination of the locking-bolt having a projecting spring, the pivoted lever engaged at one end with said bolt, the latch-bolt havingastronger projecting springand engaging the other end of said lever, the detent engaging at one end the latch-bolt when in its withdrawn position and having a spring at the other end for insuring such engagement, the controlling-lever having at one end a linkconnection with the detent and a spring for drawing the said end downward and at the other the shoulder for engagement with the latch-bolt and the beveled nose, the armature having a hook engaging the beveled nose of said lever, and an electro-magnet controlling said armature, all substantially as and for the purposes set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

HEINRICH GREFEN.

Witnesses:

WILHELM KULNERS, FRITZ SoHiiLrE. 

